LOCATION MANNERING ID

Established Series
Rev. BDG/EMM
07/2013

MANNERING SERIES

The Mannering series consists of very deep, somewhat poorly drained soils on drainageways, floodplains, and low terraces. They formed in mixed volcanic ash and alluvium. Saturated hydraulic conductivity is moderately high. Slope ranges from 2 to 5 percent. The average annual air temperature is about 6.5 degrees C. The average annual precipitation is about 787 mm.

TAXONOMIC CLASS: Coarse-loamy, isotic, frigid Vitrandic Eutrudepts

TYPICAL PEDON: Mannering ashy silt loam, forested; on a southeast facing low terrace with 7 percent slope at an elevation of 939 meters. Pedon was described on June 12, 2002 and was moist to 132 cm then saturated below. (Colors are for moist soil unless otherwise noted.)

Oi--0 to 1 cm; slightly decomposed needles, twigs and moss.

Oe--1 to 3 cm; moderately decomposed needles twigs and moss. (Combined thickness of O horizons is 1 to 3 cm)

A--3 to 18 cm; dark brown (10YR 3/3) ashy silt loam, brown (10YR 5/3) dry; strong fine and medium subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; common very fine and fine, few medium and coarse roots; common very fine tubular pores; 1 percent subangular mixed gravel; very strongly acid (pH 5.0); abrupt smooth boundary. (5 to 28 cm thick)

Bw1--18 to 38 cm; dark yellowish brown (10YR 3/4) ashy loam, light yellowish brown (10YR 6/4) dry; weak very fine, fine and medium subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; common very fine and fine, and few medium and coarse roots; common very fine tubular pores; 1 percent subangular mixed gravel; noneffervescent; strongly acid (pH 5.5); clear wavy boundary.

Bw2--38 to 69 cm; dark yellowish brown (10YR 4/4) loam, very pale brown (10YR 7/3) dry; moderate medium and coarse subangular blocky structure; slightly hard, friable, nonsticky and moderately plastic; few fine and medium, and common very fine roots; many very fine and fine tubular pores; 1 percent faint skeletans on surfaces along pores, 5 percent faint clay bridges on surfaces along pores, and 25 percent faint skeletans on faces of peds; 5 percent fine platy mica flakes; 3 percent subangular mixed gravel; noneffervescent; strongly acid (pH 5.3); gradual wavy boundary.

Bw3--69 to 89 cm; dark brown (10YR 3/3) gravelly silt loam, very pale brown (10YR 7/3) dry; moderate medium and coarse subangular blocky structure; moderately hard, friable, nonsticky and moderately plastic; common very fine, and few fine and medium, roots; many very fine and few fine tubular pores; 5 percent faint skeletans on surfaces along pores and 15 percent faint skeletans on faces of peds; 1 percent fine faint irregular dark grayish brown (10YR 4/2) moist, iron depletions; 5 percent fine platy mica flakes; 15 percent subangular mixed gravel; strongly acid (pH 5.3); gradual wavy boundary.

Bw4--89 to 117 cm; dark brown (10YR 3/3) silt loam, light yellowish brown (10YR 6/4) dry; moderate fine, medium and coarse subangular blocky structure; moderately hard, friable, slightly sticky and moderately plastic; few very fine and fine roots; common very fine tubular pores; 25 percent faint skeletans on faces of peds; 1 percent fine faint irregular dark yellowish brown (10YR 3/4) moist, masses of oxidized iron and 1 percent fine faint irregular dark grayish brown (10YR 4/2) moist, iron depletions; 5 percent fine platy mica flakes; 10 percent subangular mixed gravel; moderately acid (pH 5.6); abrupt wavy boundary. (Combined thickness of the Bw horizons is 18 to 117cm)

BC--117 to 140 cm; dark yellowish brown (10YR 4/4) very fine sandy loam, very pale brown (10YR 7/4) dry; weak coarse subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; few very fine roots; few very fine tubular pores; 25 percent faint skeletans on faces of peds; 1 percent fine distinct irregular light yellowish brown (10YR 6/4) moist and 15 percent fine faint irregular dark yellowish brown (10YR 4/6) moist, masses of iron accumulation; 2 percent fine platy mica flakes; 5 percent subangular mixed gravel; moderately acid (pH 5.7); abrupt wavy boundary. (0 to 23 cm thick)

C--140 to 160 cm; dark brown (10YR 3/3) loam, pale brown (10YR 6/3) dry; massive; moderately hard, friable, nonsticky and slightly plastic; few very fine roots; few very fine tubular pores; 15 percent fine and medium distinct irregular dark grayish brown (10YR 4/2) moist, iron depletions and 30 percent fine distinct irregular dark yellowish brown (10YR 3/6) moist, masses of iron accumulation; 15 percent fine platy mica flakes; 5 percent subangular mixed gravel; moderately acid (pH 5.6).

TYPE LOCATION: Latah County, Idaho; about five miles north and eleven miles east of Harvard, Idaho; about 76 meters south and 30 meters west of the northeast corner of Sec. 19, T42N, R1W; Latitude - 46 degrees, 58 minutes, 46 seconds North, Longitude - 116 degrees, 29 minutes, 58 seconds West, NAD83; UTM Zone 11 Easting - 538070 meters, Northing - 52023001 meters, NAD83; USGS Abes Knob Quadrangle.

RANGE IN CHARACTERISTICS:

Soil moisture - usually moist year round, not dry for 45 consecutive days June to October. (udic moisture regime)
Average annual soil temperature - 3 to 7 degrees C.
Average summer soil temperature - 8.3 to 10.5 degrees C., with an 0 horizon (frigid temperature regime)
Depth to low chroma redoxomorphic features - 50 to 100 cm
Depth to water table - typically, 32 to 73 cm from December to June

A horizon
Value - 4 to 6 dry, 3 or 4 moist
Chroma - 2 to 4 dry, 2 or 3 moist
Textures - ashy silt loam or ashy loam
Clay content - 8 to 18 percent
Rock fragments - 0 to 10 percent gravel
Volcanic glass content - 8 to 20 percent
Acid oxalate extractable Al + 1/2 Fe - 0.3 to 0.8 percent
Reaction - 5.4 to 6.3

Bw or Bt horizons
Value - 6 or 7 dry, 3 to 5 moist
Chroma - 2 to 6 dry, 2 to 4 moist
Textures - ashy-loam, silt loam, sandy loam, or fine sandy loam
Clay content - 8 to 16 percent
Rock fragments - 0 to 15 percent gravel
Reaction - 5.1 to 6.0

BC horizons
Value - 4 or 5 moist
Chroma - 4 or 6 dry
Textures - fine sandy loam or very fine sandy loam
Clay content - 10 to 13 percent
Rock fragments - 5 to 15 percent gravel
Reaction - 5.1 to 6.0

C horizons
Hue - 10YR or 2.5Y dry or moist
Value - 4 to 7 dry, 3 to 5 moist
Chroma - 1 to 3 dry, 1 to 4 moist
Textures - loam, sandy loam, or loamy sand
Clay content - 1 to 17 percent
Rock fragments - 0 to 20 percent gravel
Reaction - 4.5 to 6.0

COMPETING SERIES: This is the Aldermand series. Aldermand soils do not have redoxomorphic features within 100 cm of the soil surface.

GEOGRAPHIC SETTING: Mannering soils are on drainageways, floodplains and terraces in mountainous areas. They are at elevations of 763 to 1067 meters. They have slopes ranging from 2 to 5 percent. These soils formed in mixed volcanic ash and alluvium. The average annual temperature is 5 to 8 degrees C. The average annual precipitation is 635 to 1194 mm and the frost-free season is 85 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Reggear, Threebear and Flewsie series. Reggear and Threebear soils have a fragipan and occur on hills. Flewsie soils have a thick volcanic ash mantle and occur on mountain slopes.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained. Saturated hydraulic conductivity is moderately high. An apparent water table occurs with its surface at 30 to 75 cm from January to June and at 80 to 160 cm from July to December.

USE AND VEGETATION: This soil is used primarily for timber production,
livestock grazing, wildlife habitat, recreation, and watershed. The
natural vegetation is mainly western hemlock, western redcedar, grand fir, Idaho goldthread, common ladyfern, queencup beadlily, British Columbia wild ginger, Piper's anemone, bunchberry dogwood, starry false Solomon's seal, American trailplant and sweetscented bedstraw.

DISTRIBUTION AND EXTENT: North-Central Idaho. Mannering soils are not extensive. MLRA 43A.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Latah County, Idaho, 2013

REMARKS: Diagnostic and other features recognized in this pedon are:

Ochric epipedon - The zone from 0 to 18 cm (Oi, Oe and A horizons).

Cambic horizon - The zone from 18 to 140 cm (Bw1, Bw2, Bw3, Bw4 and BC horizons).

Vitrandic feature - The zone from 3 to 38 cm (A and Bw1 horizons).

Oxyaquic feature - this soil also meets the criteria for an Qxyaquic subgroup with iron depletions present in the zone from 69 to 100 cm (Bw3 and part of the Bw4).

Particle size control section - The zone from 28 to 103 cm (part of the Bw1, Bw2, Bw3 and part of the Bw4 horizon).

ADDITIONAL DATA: Laboratory data is available for this series: Soil survey sample no. S04-ID-057-006 (project no. C2004USID198, Pedon no. 04N1102)(a similar pedon) from Latah County, Idaho by NSSL, Lincoln, NE.

National Cooperative Soil Survey
U.S.A.